One lane on the main highway connecting Washington and Oregon was reopened Thursday evening after it was closed due to a major landslide.

The landslide which covered Highway 30 just south of the St. Johns Bridge in Portland was caused by heavy rains brought by a major Northwest storm.

The storms have caused rivers to burst their banks and roads to close.

At least two people were killed in the Pacific Northwest due to the storm.

The National Weather Service also was checking reports of a possible tornado touching down in southwest Washington on Thursday.

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Johnson Creek swells near flood stage in Portland, Ore., Wednesday, Dec. 9, 2015 as the Pacific Northwest was soaked by another night of heavy rain, Wednesday, Dec. 9, 2015. The Oregon Department of Transportation says landslides and high water have closed parts of many state highways. (AP Photo/Steve Dipaola)

Anna Miller-Jessel and her son Kaydan Seai, 2, survey damage in their Eugene, Ore., neighborhood Thursday, Dec. 10, 2015, after a wind and rain storm moved through overnight, toppling several trees along the street and causing damage to cars and homes. (Brian Davies/The Register-Guard via AP) MANDATORY CREDIT

Robin Baden, and her husband Gary look at this pick-up truck as a Walla Walla Police Officer takes pictures of the tree that landed on the truck Thursday, Dec. 10, 2015 as Baden was approaching the corner of Clinton Street and East Issaacs Avenue in Walla Walla, Wa. Forecasters say the dramatic storms in the Pacific Northwest were easing up Thursday, but the threat from mudslides and flooding remained. (Michael Lopez/Walla Walla Union-Bulletin via AP)

A large fir tree fell on a house overnight and killed an elderly woman in Portland, Ore., Wednesday, Dec. 9, 2015. Heavy rain and wind has caused at least one death in the region. (AP Photo/Steve Dipaola)